#include <Eigen/Dense>
#include <iostream>

using namespace std;
int
main()
{
	Eigen::Matrix2d mat;
	mat << 1, 2, 3, 4;
	cout << "Here is mat.sum():       " << mat.sum() << endl;
	cout << "Here is mat.prod():      " << mat.prod() << endl;
	cout << "Here is mat.mean():      " << mat.mean() << endl;
	cout << "Here is mat.minCoeff():  " << mat.minCoeff() << endl;
	cout << "Here is mat.maxCoeff():  " << mat.maxCoeff() << endl;
	cout << "Here is mat.trace():     " << mat.trace() << endl;
}
